FUNCTION: Simple push to engage bolt. Key operated locking and unlocking for added security. Designed for most doors and windows. QUALITY: The body is made of Zinc Alloy and the bolt is constructed from steel for enhanced strength and durabiliy. SECURITY: This locking bolt provides an additional locking point on the door. Can be fixed vertically or horizontally. TWO INSTALL METHODS: Metal keep and metal sleeve provided for wider application depending on the type of door frame. FIXTURES AND FITTINGS: All supplied including fixing screws, keep, sleeve and 2 keys. Surface mounted for easy installation.